Related Experiment Video
Updated: May 9, 2026
3D Scanning Technology Bridging Microcircuits and Macroscale Brain Images in 3D Novel Embedding Overlapping Protocol
Published on: May 12, 2019
Cubic Millimeter High Resolution 3D Inner-Volume GRASE (IV-GRASE) CEST MRI Using T1-Integrated Variable Density CAIPI
Hahnsung Kim1,2, Suhyung Park3, Julius Juhyun Chung1
1Emory National Primate Research Center, Emory University, Atlanta, Georgia, USA.
Purpose:
To develop a cubic-millimeter, high-resolution CEST MRI sequence with enhanced efficiency and quantitative stability.
Methods:
The sequence combined an inversion-recovery T1 module and a multi-offset CEST module, both acquired with inner-volume GRASE (IV-GRASE) readout. Acquisition efficiency was improved using variable-density random-walk sampling, and reconstruction employed a self-calibrated joint framework with sparsity and low-rank constraints to leverage redundancy across T1 and CEST datasets. Feasibility was evaluated in phantoms and preliminary patient studies.
Results:
The framework enabled simultaneous T1 and CEST imaging with reduced artifacts, improved quantitative stability, and efficient high-resolution reconstruction. Phantom experiments demonstrated accurate T1 and Z-spectral measurements with inherently co-registered datasets. Preliminary patient imaging revealed heterogeneity within the diseased region and exchange-dependent relaxation contrast, clearly differentiating it from contralateral normal tissue.
Conclusion:
The proposed hybrid T1-CEST MRI sequence provides efficient, artifact-reduced, and quantitatively reliable high-resolution imaging in a single acquisition, advancing the feasibility of quantitative CEST analysis.
